The present subject matter provides method and apparatus for hearing assistance devices, and more particularly to hearing assistance devices using ferroelectret (also referred to as piezoelectret) polymer foam. Various embodiments include ferroelectret polymer foam on or in the hearing instrument as a microphone. Various embodiments include ferroelectret polymer foam on or in the hearing instrument as a momentary switch sensor.
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January 3, 2013
July 5, 2016
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